Options never hurt, but they take up disk space which is very limited on some devices (Chromebook Pixel). I would suggest to make any and all GUIs and engines optional during the installation process. And I would also add Wine to those options, for users wanting to give CB9 a try under Linux.
Really good project Jim.

I won't be updating it anymore (except the 64 bit edition to bring it in line with the 32 bit edition). It does everything I want it to do now. Play chess, Engine vs Engine, Analysis, compile engines from src etc.